Question

evaluate:---
-7x^3+3x^3+11x-9 for x=-2

Answer 1

$-7x^{2} + 3x^{3} + 11x$

$= -7$ × $2^{2}$ + $3$ × $2^{3}$ + $11$ × $2$

$= -7$ × $4 + 3$ × $8 + 11$ × $2$

$= -28 + 24 + 22$

$= 18$